Question: Name the most used railroad run by the Massachusetts Bay Transportation Authority?
Paraphrase: Which Massachusetts Bay Transportation Authority railroad is used the most?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q22667 . ?ent wdt:P1373 ?obj . ?ent wdt:P361 wd:Q171985 } ORDER BY DESC(?obj)LIMIT 5